1 /**********************************************************
2 * Copyright 2008-2009 VMware, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26 #ifndef SVGA_SAMPLER_VIEW_H
27 #define SVGA_SAMPLER_VIEW_H
28
29
30 #include "pipe/p_compiler.h"
31 #include "pipe/p_state.h"
32 #include "util/u_inlines.h"
33 #include "svga_screen_cache.h"
34
35 struct pipe_context;
36 struct pipe_screen;
37 struct svga_context;
38 struct svga_winsys_surface;
39 enum SVGA3dSurfaceFormat;
40
41
42 /**
43 * A sampler's view into a texture
44 *
45 * We currently cache one sampler view on
46 * the texture and in there by holding a reference
47 * from the texture to the sampler view.
48 *
49 * Because of this we can not hold a refernce to the
50 * texture from the sampler view. So the user
51 * of the sampler views must make sure that the
52 * texture has a reference take for as long as
53 * the sampler view is refrenced.
54 *
55 * Just unreferencing the sampler_view before the
56 * texture is enough.
57 */
58 struct svga_sampler_view
59 {
60 struct pipe_reference reference;
61
62 struct pipe_resource *texture;
63
64 int min_lod;
65 int max_lod;
66
67 unsigned age;
68
69 struct svga_host_surface_cache_key key;
70 struct svga_winsys_surface *handle;
71 };
72
73
74
75 extern struct svga_sampler_view *
76 svga_get_tex_sampler_view(struct pipe_context *pipe,
77 struct pipe_resource *pt,
78 unsigned min_lod, unsigned max_lod);
79
80 void
81 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v);
82
83 void
84 svga_destroy_sampler_view_priv(struct svga_sampler_view *v);
85
86 void
87 svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv);
88
89 static INLINE void
svga_sampler_view_reference(struct svga_sampler_view ** ptr,struct svga_sampler_view * v)90 svga_sampler_view_reference(struct svga_sampler_view **ptr, struct svga_sampler_view *v)
91 {
92 struct svga_sampler_view *old = *ptr;
93
94 if (pipe_reference_described(&(*ptr)->reference, &v->reference,
95 (debug_reference_descriptor)svga_debug_describe_sampler_view))
96 svga_destroy_sampler_view_priv(old);
97 *ptr = v;
98 }
99
100
101 #endif
102